code: def test_bunch_attribute():
      b = nib.Bunch(a=1, b=[2, 3], c=None)
      assert b.a == 1
      assert b.b == [2, 3]
      assert b.c is None
  
file_path: nipype/nipype/interfaces/base/tests/test_support.py
imports: import os
  import pytest
  from pkg_resources import resource_filename
  from ....utils.filemanip import md5
  from ...None import base
label_desc: Use image node_id 2 for calling a global function with example usage: test_bunch_attribute() without return types